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Author SHA1 Message Date
Eelco Dolstra 2341f30ec6 Clean up the 'outputs' interface 2019-08-30 13:06:23 +02:00
Eelco Dolstra 89468410d5 Extract flake dependencies from the 'outputs' arguments 
That is, instead of

  inputs = [ "nixpkgs" ];

  outputs = inputs: ... inputs.nixpkgs ...;

you can write

  outputs = { nixpkgs }: ... inputs.nixpkgs ...;
 2019-08-30 11:22:34 +02:00
Eelco Dolstra b29cec7697
Don't write lock files if they have dirty inputs 2019-07-12 13:29:54 +02:00
Eelco Dolstra 0802e006f2
Use "git add --force --intent-to-add" for flake.lock 
Fixes

  The following paths are ignored by one of your .gitignore files:
  flake.lock
 2019-07-11 17:05:53 +02:00
Eelco Dolstra ad42a78469
Rename 'epoch' -> 'edition' 2019-07-11 13:54:53 +02:00
Eelco Dolstra b0c220c02e
Check for epochs < 201906 2019-07-10 10:27:33 +02:00
Eelco Dolstra d4fe9daed6
Simplify getFlake() / fetchFlake() logic 2019-06-21 19:04:58 +02:00
Eelco Dolstra aa2846198f
Don't update the global registry when building a locked flake 
It's unnecessary and slows things down (e.g. when you're on a Thalys
with super-crappy Internet).
 2019-06-21 18:34:43 +02:00
Eelco Dolstra d132d057a8
Handle store symlinks in flake directories 
E.g. 'nix path-info ./result' inside a flake directory now works
again.
 2019-06-21 15:29:05 +02:00
Eelco Dolstra e75ffbf04a
Merge pull request #2937 from CSVdB/fuzzymatching-v2 
FuzzyMatching works
 2019-06-18 18:03:38 +02:00
Nick Van den Broeck 59714a15e0 FuzzyMatching works 
Fixes #2843
 2019-06-18 17:01:57 +02:00
Eelco Dolstra 69b047f4ce
writeRegistry(): Write correct version 2019-06-11 21:32:57 +02:00
Eelco Dolstra c47d2dac6c
Disable EvalCache in impure mode 2019-06-07 22:38:39 +02:00
Eelco Dolstra 6644b6099b
Add flake evaluation cache 
This exploits the hermetic nature of flake evaluation to speed up
repeated evaluations of a flake output attribute.

For example (doing 'nix build' on an already present package):

  $ time nix build nixpkgs:firefox

  real    0m1.497s
  user    0m1.160s
  sys     0m0.139s

  $ time nix build nixpkgs:firefox

  real    0m0.052s
  user    0m0.038s
  sys     0m0.007s

The cache is ~/.cache/nix/eval-cache-v1.sqlite, which has entries like

  INSERT INTO Attributes VALUES(
    X'92a907d4efe933af2a46959b082cdff176aa5bfeb47a98fabd234809a67ab195',
    'packages.firefox',
    1,
    '/nix/store/pbalzf8x19hckr8cwdv62rd6g0lqgc38-firefox-67.0.drv /nix/store/g6q0gx0v6xvdnizp8lrcw7c4gdkzana0-firefox-67.0 out');

where the hash 92a9... is a fingerprint over the flake store path and
the contents of the lockfile. Because flakes are evaluated in pure
mode, this uniquely identifies the evaluation result.
 2019-06-07 22:25:48 +02:00
Eelco Dolstra 54aff8430c
Move flake-related stuff to src/libexpr/flake 2019-06-05 16:51:54 +02:00